Grate for mechanical stokers.



H. E. PARSON.

GRATE FOR MECHANICAL STOKERS.

APPLICATION FILED OGT.1S,1905.

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H. E. PARSON. GRATE FOR. MECHANICAL STOKERS.

APPLIOATIOH FILED OCT. 18, 1905.

Patented May 16; 1911.

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*Wi tummy manual H. B. PARSON. GRA'TB FOR MEGHANIGAL STOKERS.

APRLIOIATION FILED 00T.18,1905.

Patented May 16, 1911.

3 SHEETSSHEET 3v user strainers soar UNITED STATES rarnnr OFFICE.

HENRY EDWIN reason. or new YORK, N. Y.

son MECHANICAL sronnre's.

Specification of Letters Patent. A

Patented May 16,1911- Divided and this: application filed October I TooZZ whom it may concern:

Be it known that I, HENRY E. Pnnsox, a

citizen of the United States of America, and

1 ticularly adapted for resident of the city of New York, county and State of New York, have invented certain new and useful Improvements in Grates for Mechanical Stokers, of which the following' is a specification.

My invention relates to certain new and useful improvements in grates and the object of my invention is to produce a grate, paruse in connection with a mechanical stoker and Wltll' which any kind of coal may be burned with equally good effect.

The grates are of peculiar construction having ren'xovable bars with ash pockets parallel to the length of the fire in their upper surface and an ash pocketlocatcd transverse of the grate upon its rear edge. These grates are inclined and I provide a dam located at the lower endthereof to control the thickness of the fire and the speed with which it will travel down the grate.

This application is a division of my application Serial No. 247,083, filed Feb. 24, 1905.

Referring to the drawings wherein the same part is designated by the same'reference numeral wherever it occurs, Figure 1 is a Vertical longitudinal section otihe grate. Fig. 2 is a top plan View partly broken away, showing the grate and frame and its operating mechanism. Fig. 3 is a perspective view of oneof the grates which are driven and used as ash and fuel pushers. Fig. i is a vertical transverse section of the same. Fig. 5 is a vertical longitudinal section of the same. Fig. 6 is a perspectiveview of one of the detached bars. Fig. 7'is a verticalelevation, partly in section of the sup porting rollers.

I have shown my grate as. adapted for use in connection with a furnace of the type shown in my application Serial No. 247,083, above referred to, and I hereby reter'to said application for a detail description of all parts which are shown, but not described in this application, or which are entirely -omit ted therefrom. In this application. I confine my description and claims to the grate mechanism and will not describe the other parts which enter into the construction of a furnace.

1 designates the grate as a whole and it is composed of a series of grate sections 2 and l l I l of the upper edges.

between the sections-3 and overlap them so that the sections form a flight of steps from the top to the bottom 'ofthe grate. The sections 2 are movable while are stationary. The sections lower end of the flight, the sections'l2 are thicker than those higher up. The sections are shown in detail in Figs. 3 to 6.inclusive.

Referring to these figures; F ig. 3 shows one of the sections 2. iug the removable bars removed. This section consists of a frame 4. divided into two portions by partitions interior undercut dove-tail rgro oves 6 in which are fitted the detachable grate bars 7.

8 is an ash pocket on the rear edge of the grate frame which is a pushing edge. This ash pocket 8 serves to grate frame from being burned by the fire. l teferring to Figs. 4. v

The bars 7 have beveled ends to fit the undercut groove 6. and top surfaces. The bottoms of the barsa're extended downward so as to absorbtheheat from the top and thus prevent thelbiirning 1 The pockets become filled with ash and face from the fire. undercut groove 6 at one end and through which the bars 7 are inserted. The last bar is secured in place by pin 10. 11 are pairs of lugs on the lower edge of the frame of i the grate on each side adapted to receive the device by which the sections are supported Y at their front ends and by which they are reciprocated. The grate sections 3 resemble in structure the and are mounted at their rear ends in lugs or seats 12, whiehproject through the hearing bars of the furnace carrying the stationary sections, as is'best shown in Fig. 1.

The grate, as has been, before stated, is

composed of movable sections and stationary sections. A suitable number of movable sections arc of equal thickness, while another lions to which they are adjacent. The greater thickness of some of the sect1ons,:as above mentioned, all of which are-given the same throw irrespective of their thickness, 110

3. The sections Q-a're located alternately thesections 3 60 r 2 are dentical in construction except that atz the one half of the sect-ion hav 5 and having on its protect the edge ofthe 5 and 6, the construetron of the grate sections willbe understood.

deep pockets in their 30 protect the upper sur- .3 9 are slots cut in the sections 2, but are stationary part of the movable sections, suitable in number for given fuel COIldltlOIlS are made thicker than are the Statmnarysecwill cause a greater quantity of ash and fuel 1 ing upon them to be moved forward and ownward with each stroke than will be the case with sections which are less thick. This will roduce at the proper part of the fire a suita le thickness of the fire and permit.of a suitable supply of air for the best combuss tion and insure the complete burning of the coal before it passes off the grate.

13 is a grate supporting and reciprocating frame which is shown in Figs. 1 and 2. The frame is provided withflanges 14, two for each side, projecting laterally from the sides of the frame and resting upon the support ing rollers 15. Upon the upper surfaceof the sides of the frame and projecting vertically are a series of fingers 16 which are provided on their upper ends with heads of suitable shape. To the frame 13 is connected a rod 17 which is actuated in a suitable manner, for instance, in the manner shown and described in my application above referred to, so as to give the frame a reciprocating movement. The grate frame is supported in an inclined position below the grate bars, but the flanges or .lugs are horizontal, while the fingers are vertical and engage the movable ends of the grate bars between the lugs 11.

' The construction of the supporting rollers by which the grate frames are supported is shown in detail in Fig. 2. Referring to this figure, 18 is a grate frame divided into three sections by the bearing bars 19 which are expanded at their lower edges to form bosses 20. The bosses are recessed at 21 on each end and perforated through the bottom of the recessesto form a bearing for the axles 22. On each of the axles 22 are fitted the grate frame supporting rollers 15 which have hubs 23 which center the recesses 21 and serve to protect the axles 22 from ash. The central bearing bars 19 are provided with double bosses and supporting rollers,

while the side bars have but one pair.

24 is an inclined table abutting the frame 18 and supported upon the main grate support which rests upon the division wall. To the rear edge of the table 24 is pivoted an ash dam 25 whiclroverliangs the ash pit and is connected at its lower slde to a push rod *pivotedto the dam at one end and protruding through the front wall at its other. At

its front end, it may be rovided with any suitable means for operating the same, such as a hand wheel 26 engaging the threaded end of the rod by which the dam may be set at any desired angle, so as to hold back the ash and fire and give to the fire any desired thickness upon the grate.

The operation of my device will be appar ent from the foregoing description.

While I have described what I believe to be the preferred form of my invention, I desire to have it understood that many changes may be made in the form, construction, and arrangement of parts without departing from the spirit of my invention.

What- I claim as new and desire to secure by Letters Patent is:

1. In a mechanical stoker, the combination of a series of grate sections overlapping each other to produce an inclined stepped grate, alternate sections being stationary and alternate sections reciprocating and resting at their forward ends on the stationary sections, an inclined frame below the grate provided with vertically projecting fingers which engage and support the ends of the reciprocating sections; a series of supporting rollers mounted adjacent to the frame and in a plane parallel to it, roller supports having recesses in which the rollers engage, and

means supporting the frame upon the rollers whereby the frame may reciprocate horizontally and still maintain its inclination.

2. Ina mechanical stoker, a fuel advancing rate having a passage over the lower end thereof to the ash pit, a dam at the lower.

end of the grate protruding upward into said passage, and means for adjusting the position of the upper edge of said dam and securing said upper edge in various adjusted positions to restrict said passage, and thereby to regulate the fuel carrying capacity of the grate.

Signed by me at. Birmingham, Alabama, this 12th day of October, 1905.

HENRY EDWIN PARsoNL Witnesses:

RUTH S. PATRICK, ARCHIE WRIGHT. 

